Fluid cushion



FIG. 1 is a top, front and left side perspective view of a fluid cushion showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a right side elevational view thereof, the left side being a mirror image of that shown. 

The ornamental design for a fluid cushion, as shown and described. 